Patent
1990-01-29
1995-05-09
Downs, Robert W.
395 51, 395906, G05B 2302, G05B 1300
Patent
active
054147980
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a system for automatically generating knowledge information relating to the operations of a variety of subjects of control from information of the running state of the subjects and, more particularly, to a system suitable for constructing a knowledge data base of a knowledge engineering applied expert system which can contribute to the operation of a large-scale subject of control composed of complicated processes.
BACKGROUND ART
In recent years, there have been widely developed, in various fields, a knowledge engineering applied expert system which makes use of the concept of AI (Artificial Intelligence). This system is intended to extract solutions or failures for an inquiry from the experiences already stored and to display and output them, or further, to control a variety of subjects by means of a computer. For realizing this system, the most serious problem resides in the difficulty of collecting past experiences of the experts or operators massively and accurately as knowledge. This cause will be examined in case the expert system is applied to the operation of a subject of control. 1. For experiences of medium- or large-scale accidents, records are complete, and the operator's memory is clear. Nevertheless, it is usual that small-scale accidents or minor events are neither recorded nor remembered clearly. 2. The operator himself to supply the knowledge is not convinced that his daily minor experiences are worth being stored in the computer so that they may be used as the knowledge of the expert system.
Here, the medium- or small-scale accidents are experienced a little, and these special events could not constitute an effective knowledge group. Since, moreover, the expert system to be applied to such a subject should ensure the operation without any accident, the knowledge should be collected from the rather minor events to be experienced in daily operation, such as the small-scale accidents.
There are known in the prior art several methods for collecting knowledge dictating how the expert himself reacts and behaves against the situations set by the computer. For example, Japanese Patent Laid-Open No. 60 - 203576 discloses an invention which is directed to a system for acquiring train rules for making a railway diagram. The knowledge engineer or expert himself simulates and displays the situation of an abnormal state (e.g., the disturbances of the diagram) by setting the abnormal state so that his knowledge may be smoothly extracted as if he actually faces the practical problem. Japanese Patent Laid-Open No. 59 - 167771 discloses a system for acquiring knowledge by creating "questions" for searching ultimate causes by use of the knowledge relations systemized by the structuring method and in cooperation with the specialists. However, this system finds it difficult to make the questions and is accompanied by a problem that it cannot acquire much knowledge information efficiently according to the real operation of the subject of control.
DISCLOSURE OF INVENTION
Therefore, the present invention has an object to provide a knowledge information generating system which can acquire much knowledge information efficiently according to the real operation of the subject of control.
In the present invention, the relations among the process data of a subject of control are grapsed in advance and stored as fundamental rules, and these fundamental rules stored in connection with the process data are extracted from fluctuations of the process data inputted from the actual subject so that the more detailed relations among the process data are acquainted as knowledge from the change in the process data described in the fudamental rules and the process data acting as the trigger.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a schematic diagram showing the structure of the system of the present invention; FIGS. 2(a) and 2(b) are a schematic diagram showing a process data input processing portion; FIGS. 3(a) and 3(b) are a diagram showing the stored situation of a bu
REFERENCES:
patent: 4517468 (1985-05-01), Kemper et al.
patent: 4658370 (1987-04-01), Erman et al.
patent: 4920499 (1990-04-01), Skeirik
patent: 4931951 (1990-06-01), Murai et al.
Fukai Masayuki
Namba Shigeaki
Nigawara Seiitsu
Downs Robert W.
Hitachi , Ltd.
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